services.AddControllersWithViews() 与 services.AddMvc()

Question

为了能够在我的 ASP.NET Core 应用程序中添加控制器，我可以添加

services.AddControllersWithViews()

或者

services.AddMvc()

在课堂上的ConfigureServices方法中Startup。

看起来他们两个对我来说都很好。我想知道在什么情况下哪个更好？

据我所知，services.AddMvc()是较旧的方式，但仍然可用。

如果我继续使用，以后services.AddMvc()会不会有问题？

Answer 1

源代码不言自明

MvcServiceCollectionExtensions.AddMvc()

/// <summary>
/// Adds MVC services to the specified <see cref="IServiceCollection" />.
/// </summary>
/// <param name="services">The <see cref="IServiceCollection" /> to add services to.</param>
/// <returns>An <see cref="IMvcBuilder"/> that can be used to further configure the MVC services.</returns>
public static IMvcBuilder AddMvc(this IServiceCollection services)
{
    if (services == null)
    {
        throw new ArgumentNullException(nameof(services));
    }

    services.AddControllersWithViews();
    return services.AddRazorPages();
}

/// <summary>
/// Adds MVC services to the specified <see cref="IServiceCollection" />.
/// </summary>
/// <param name="services">The <see cref="IServiceCollection" /> to add services to.</param>
/// <param name="setupAction">An <see cref="Action{MvcOptions}"/> to configure the provided <see cref="MvcOptions"/>.</param>
/// <returns>An <see cref="IMvcBuilder"/> that can be used to further configure the MVC services.</returns>
public static IMvcBuilder AddMvc(this IServiceCollection services, Action<MvcOptions> setupAction)
{
    if (services == null)
    {
        throw new ArgumentNullException(nameof(services));
    }

    if (setupAction == null)
    {
        throw new ArgumentNullException(nameof(setupAction));
    }

    var builder = services.AddMvc();
    builder.Services.Configure(setupAction);

    return builder;
}

MvcServiceCollectionExtensions.AddControllersWithViews()

/// <summary>
/// Adds services for controllers to the specified <see cref="IServiceCollection"/>. This method will not
/// register services used for pages.
/// </summary>
/// <param name="services">The <see cref="IServiceCollection" /> to add services to.</param>
/// <returns>An <see cref="IMvcBuilder"/> that can be used to further configure the MVC services.</returns>
/// <remarks>
/// <para>
/// This method configures the MVC services for the commonly used features with controllers with views. This
/// combines the effects of <see cref="MvcCoreServiceCollectionExtensions.AddMvcCore(IServiceCollection)"/>,
/// <see cref="MvcApiExplorerMvcCoreBuilderExtensions.AddApiExplorer(IMvcCoreBuilder)"/>,
/// <see cref="MvcCoreMvcCoreBuilderExtensions.AddAuthorization(IMvcCoreBuilder)"/>,
/// <see cref="MvcCorsMvcCoreBuilderExtensions.AddCors(IMvcCoreBuilder)"/>,
/// <see cref="MvcDataAnnotationsMvcCoreBuilderExtensions.AddDataAnnotations(IMvcCoreBuilder)"/>,
/// <see cref="MvcCoreMvcCoreBuilderExtensions.AddFormatterMappings(IMvcCoreBuilder)"/>,
/// <see cref="TagHelperServicesExtensions.AddCacheTagHelper(IMvcCoreBuilder)"/>,
/// <see cref="MvcViewFeaturesMvcCoreBuilderExtensions.AddViews(IMvcCoreBuilder)"/>,
/// and <see cref="MvcRazorMvcCoreBuilderExtensions.AddRazorViewEngine(IMvcCoreBuilder)"/>.
/// </para>
/// <para>
/// To add services for pages call <see cref="AddRazorPages(IServiceCollection)"/>.
/// </para>
/// </remarks>
public static IMvcBuilder AddControllersWithViews(this IServiceCollection services)
{
    if (services == null)
    {
        throw new ArgumentNullException(nameof(services));
    }

    var builder = AddControllersWithViewsCore(services);
    return new MvcBuilder(builder.Services, builder.PartManager);
}

/// <summary>
/// Adds services for controllers to the specified <see cref="IServiceCollection"/>. This method will not
/// register services used for pages.
/// </summary>
/// <param name="services">The <see cref="IServiceCollection" /> to add services to.</param>
/// <param name="configure">An <see cref="Action{MvcOptions}"/> to configure the provided <see cref="MvcOptions"/>.</param>
/// <returns>An <see cref="IMvcBuilder"/> that can be used to further configure the MVC services.</returns>
/// <remarks>
/// <para>
/// This method configures the MVC services for the commonly used features with controllers with views. This
/// combines the effects of <see cref="MvcCoreServiceCollectionExtensions.AddMvcCore(IServiceCollection)"/>,
/// <see cref="MvcApiExplorerMvcCoreBuilderExtensions.AddApiExplorer(IMvcCoreBuilder)"/>,
/// <see cref="MvcCoreMvcCoreBuilderExtensions.AddAuthorization(IMvcCoreBuilder)"/>,
/// <see cref="MvcCorsMvcCoreBuilderExtensions.AddCors(IMvcCoreBuilder)"/>,
/// <see cref="MvcDataAnnotationsMvcCoreBuilderExtensions.AddDataAnnotations(IMvcCoreBuilder)"/>,
/// <see cref="MvcCoreMvcCoreBuilderExtensions.AddFormatterMappings(IMvcCoreBuilder)"/>,
/// <see cref="TagHelperServicesExtensions.AddCacheTagHelper(IMvcCoreBuilder)"/>,
/// <see cref="MvcViewFeaturesMvcCoreBuilderExtensions.AddViews(IMvcCoreBuilder)"/>,
/// and <see cref="MvcRazorMvcCoreBuilderExtensions.AddRazorViewEngine(IMvcCoreBuilder)"/>.
/// </para>
/// <para>
/// To add services for pages call <see cref="AddRazorPages(IServiceCollection)"/>.
/// </para>
/// </remarks>
public static IMvcBuilder AddControllersWithViews(this IServiceCollection services, Action<MvcOptions> configure)
{
    if (services == null)
    {
        throw new ArgumentNullException(nameof(services));
    }

    // This method excludes all of the view-related services by default.
    var builder = AddControllersWithViewsCore(services);
    if (configure != null)
    {
        builder.AddMvcOptions(configure);
    }

    return new MvcBuilder(builder.Services, builder.PartManager);
}

正如您所看到的AddMvc，基本上是包装了对 的调用AddControllersWithViews，并添加了调用AddRazorPages。

如果我继续使用 services.AddMvc() 以后会不会有问题？

真的没有办法准确地回答这个问题。

遵循当前可用文档提供的建议，以避免任何不需要的行为